tests/killdaemons.py
author Pierre-Yves David <pierre-yves.david@octobus.net>
Fri, 27 Sep 2024 15:05:26 +0200
changeset 51973 bb281ecf4036
parent 51703 ca7bde5dbafb
child 51995 23cc79e04c28
permissions -rwxr-xr-x
rev-branch-cache: fix message about overwritten data If there is data at the end we ignore, we should not count them as overwritten. This reveal that we something don't overwrite anything, this will be taken car of in the next changeset.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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#!/usr/bin/env python3
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import os
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import signal
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import sys
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import time
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if os.name == 'nt':
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    import ctypes
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    _BOOL = ctypes.c_long
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    _DWORD = ctypes.c_ulong
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    _UINT = ctypes.c_uint
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    _HANDLE = ctypes.c_void_p
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    ctypes.windll.kernel32.CloseHandle.argtypes = [_HANDLE]
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    ctypes.windll.kernel32.CloseHandle.restype = _BOOL
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    ctypes.windll.kernel32.GetLastError.argtypes = []
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    ctypes.windll.kernel32.GetLastError.restype = _DWORD
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    ctypes.windll.kernel32.OpenProcess.argtypes = [_DWORD, _BOOL, _DWORD]
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    ctypes.windll.kernel32.OpenProcess.restype = _HANDLE
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    ctypes.windll.kernel32.TerminateProcess.argtypes = [_HANDLE, _UINT]
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    ctypes.windll.kernel32.TerminateProcess.restype = _BOOL
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    ctypes.windll.kernel32.WaitForSingleObject.argtypes = [_HANDLE, _DWORD]
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    ctypes.windll.kernel32.WaitForSingleObject.restype = _DWORD
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    def _check(ret, expectederr=None):
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        if ret == 0:
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            winerrno = ctypes.GetLastError()
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            if winerrno == expectederr:
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                return True
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            raise ctypes.WinError(winerrno)
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    def kill(pid, logfn, tryhard=True):
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        logfn('# Killing daemon process %d' % pid)
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        PROCESS_TERMINATE = 1
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        PROCESS_QUERY_INFORMATION = 0x400
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        SYNCHRONIZE = 0x00100000
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        WAIT_OBJECT_0 = 0
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        WAIT_TIMEOUT = 258
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        WAIT_FAILED = _DWORD(0xFFFFFFFF).value
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        handle = ctypes.windll.kernel32.OpenProcess(
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            PROCESS_TERMINATE | SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
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            False,
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            pid,
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        )
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        if handle is None:
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            _check(0, 87)  # err 87 when process not found
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            return  # process not found, already finished
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        try:
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            r = ctypes.windll.kernel32.WaitForSingleObject(handle, 100)
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            if r == WAIT_OBJECT_0:
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                pass  # terminated, but process handle still available
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            elif r == WAIT_TIMEOUT:
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                _check(ctypes.windll.kernel32.TerminateProcess(handle, -1))
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            elif r == WAIT_FAILED:
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                _check(0)  # err stored in GetLastError()
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            # TODO?: forcefully kill when timeout
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            #        and ?shorter waiting time? when tryhard==True
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            r = ctypes.windll.kernel32.WaitForSingleObject(handle, 100)
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            # timeout = 100 ms
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            if r == WAIT_OBJECT_0:
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                pass  # process is terminated
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            elif r == WAIT_TIMEOUT:
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                logfn('# Daemon process %d is stuck')
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            elif r == WAIT_FAILED:
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                _check(0)  # err stored in GetLastError()
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        except:  # re-raises
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            ctypes.windll.kernel32.CloseHandle(handle)  # no _check, keep error
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            raise
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        _check(ctypes.windll.kernel32.CloseHandle(handle))
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else:
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    def kill(pid, logfn, tryhard=True):
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        try:
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            os.kill(pid, 0)
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            logfn('# Killing daemon process %d' % pid)
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            os.kill(pid, signal.SIGTERM)
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            if tryhard:
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                for i in range(10):
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                    time.sleep(0.05)
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                    os.kill(pid, 0)
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            else:
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                time.sleep(0.1)
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                os.kill(pid, 0)
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            logfn('# Daemon process %d is stuck - really killing it' % pid)
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            os.kill(pid, signal.SIGKILL)
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        except ProcessLookupError:
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            pass
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def killdaemons(pidfile, tryhard=True, remove=False, logfn=None):
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    if not logfn:
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        logfn = lambda s: s
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    # Kill off any leftover daemon processes
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    try:
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        pids = []
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        with open(pidfile) as fp:
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            for line in fp:
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                try:
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                    pid = int(line)
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                    if pid <= 0:
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                        raise ValueError
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                except ValueError:
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                    logfn(
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                        '# Not killing daemon process %s - invalid pid'
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                        % line.rstrip()
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                    )
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                    continue
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                pids.append(pid)
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        for pid in pids:
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            kill(pid, logfn, tryhard)
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        if remove:
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            os.unlink(pidfile)
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    except IOError:
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        pass
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if __name__ == '__main__':
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    if len(sys.argv) > 1:
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        (path,) = sys.argv[1:]
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    else:
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        path = os.environ["DAEMON_PIDS"]
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    killdaemons(path, remove=True)